Method and composition for obtaining image reversal in epoxy
formulations based upon photoinhibition
    4.
    发明授权
    Method and composition for obtaining image reversal in epoxy formulations based upon photoinhibition 失效
    基于光抑制获得环氧树脂配方中的图像反转的方法和组合物

    公开(公告)号:US5266444A

    公开(公告)日:1993-11-30

    申请号:US943075

    申请日:1992-09-10

    摘要: A method and composition are shown for producing a positive-acting photoimagible epoxy resin. In addition to the epoxy resin, the compositions include a dual component cross-linking system which combines a basic curing agent with an onium or arylonium salt. The onium or arylonium salt produces a protic acid upon exposure to irradiation causing a reaction with the basic curing agent which renders the agent ineffective as an epoxy curing agent during subsequent heating. During a subsequent bake operation, only the unexposed regions of the epoxy will cross-link. As a result, the exposed areas wash away, leaving only the cured reverse image.

    摘要翻译: 显示了用于制备正性光可氧化环氧树脂的方法和组合物。 除了环氧树脂之外,组合物还包括将碱性固化剂与鎓盐或芳基鎓盐组合的双组分交联体系。 鎓或芳基盐在暴露于照射时产生质子酸,引起与碱性固化剂的反应,其使得该试剂在随后的加热期间作为环氧固化剂无效。 在随后的烘烤操作中,仅环氧树脂的未曝光区域将交联。 结果,暴露的区域被洗掉,只剩下固化的反转图像。